20 Kilogram Coffee Roaster, MCR-20

Loader

• Optional fully integrated green coffee loader with programmable scale.
• High efficiency filtration removes green coffee dust. Reduces roaster fouling and improves air quality inside your spaces.

Chassis

• Monolithic, low carbon steel weldment – the heaviest constructed roasters in their class.
• Fully gusseted for dimensional strength and stability.
• Fully coated to prevent corrosion.
• Integrated double-walled roast compartment is heavily insulated which further converts the chassis into a thermal battery – storing heat, rather than wasting it.
• Materials in both the chassis and the roast compartment absorb heat more efficiently and release heat more consistently for increased stability of temperatures during profiling.
• Trapping heat = trapping noise. Ambient drum noise is limited to a whisper quiet 60 decibels making it easier to hear those early outliers before first crack.

Drum

• Double-wall, stainless steel drums standard on every model. The heaviest, most-efficient drum design in the industry.
• Construction accuracy is machine trued to within +/- .025”.
• 3mm air gap between inner and outer drum diffuses heat more evenly throughout inner drum.
• Diffused heat at inner wall eliminates conductive roast defect, even at higher inlet temperatures.
• Dramatically increased thermal efficiency by storing & using heat, rather than quickly releasing.
• “Bomb proof” construction prevents warping due to loss of electrical service caused drum fires.
• Every model equipped with quick response, variable drum speed allowing the operator to achieve ideal bean loft and conductive vs. convective ratio. Result is the flexibility to profile batches from 20%-120% of listed drum capacity on most models.
• Advanced drum gap adjustment mechanism is standard on all models two kilogram capacity or greater, making adjustments easier and more precise.

Fuel

• Custom-designed, CSA® Design Certified low loss gas train designed by Mill City Roasters and used exclusively in our roaster line-up.
• Custom burners designed specifically for coffee roasting.
• Burner layout is specific to each model to achieve optimal burner-to-drum relationship.
• Easy access, external shut-off valves on every roaster.
• Built-in temperature limiters to allow for safe operation.
• Built-in safety shut-off on pilot valve.
• Easy on-site conversion from LP to natural gas.
• Digital electronic modulating valve offering greater control for your most challenging profiles in variable batch sizes.
• Fuel adjustments at the push of a button.

Automation

• RoastPATH Automation ready digital control system.
• Automated between batch protocol.
• Automated operative assist cooling and stirring arm activation.
• Automated roast timer display.
• RoastPATH prompted charge and discharge.

Air & Exhaust

• Power-vented dual exhaust system standard on every model with fan placement designed to allow for easy cleaning and maintenance.
• Roaster exhaust fan is high pressure, high output 3-phase VFD speed controlled with linear response curve for more predictable and more precise airflow control and roast profiles repeatability.
• Cooling tray exhaust fan is a dedicated, high-pressure fan providing rapid cooling to stop roast progression once batch is dropped in cooling tray. Dual exhaust system allow for simultaneous roasting and cooling, reducing back-to-back batch times and increasing production to 4+ batches per hour.
• All machines include face-mounted digital drum pressure gauge.
• All models equipped with dedicated, off-board chaff filtering collectors with easy access doors to aid in frequent clearing of chaff and completion of safety checks.
• Optional quick-release venting kits available for every model.
• Fully specified requirements for venting to termination including layout and cap recommendations.
• Fan adjustments at the push of a button.

Safety

• CSA® Design Certified CSA 1.8 for US and Canada, IEC, CE, ROHS.
• CSA/UL certified Honeywell automatic ignition controller
• All UL/CSA certified Delta PLCs and VFDs.
• CSA/UL certified motors, relays, switches, and wiring.
• Optional UL® NSF Certification available on every model.
• Entire contact path of roaster (hopper, loading chute, faceplate, trier, drum, discharge gate, discharge chute, cooling tray cover, cooling tray floor, stirring/mixing arms, cooling tray gate, cooling tray latch, cooling tray gate) all custom fabricated with certified food grade stainless.
• Teflon cooling tray wipers.
• Heavy duty 5mm x 44mm Borosilicate heat resistant sight glass.
• Food service safe LED light.
• Food safe resin-impregnated trier handle.
• Stirring arms automatically stop when the cooling tray cover is opened.

Install & Maintain

• Designed with off-board cooling fans and stand-alone chaff collectors to allow for easier moving, better access and easier maintenance. Off-board components can offer more flexible layouts for users with space limitations.
• Detachable control panels for moving components through standard size door openings. Removable hoppers on all models.
• Adjustable leg heights on components.
• Quick-Connect Kits available to quickly connect components.
• Roaster body features large, full swing, removable access doors on both sides for easy access to interior components.
• Cooling tray features large, full swing, removable access doors on both sides for easier cleaning.
• Chaff collector fully disassembles for cleaning.
• Warranty